Abstract
Modern composites occupy an important place in the production of high-strength materials due to their lightness, strength, heat resistance, ability to retain their performance properties and the possibility of modification for certain tasks. The article presents modern methods of improving mechanical properties and heat resistance of metal and polypropylene-based composites, their key characteristics, as well as modern processing technologies and innovative combinations with other materials. Particular attention is paid to the prospects for the development of composites with high temperature resistance through the introduction of reinforcing refractory particles, the use of carbon fibers and nanotubes, phosphorus-containing flame retardants, lignin, elastomers, thermoplastics, which opens up new opportunities for their exploitation. Modification of polypropylene using various fillers, such as polyamides, chalk fillers, and carbon nanoparticles, significantly improves its performance characteristics, including strength, thermal stability, and electrical conductivity. This opens up new horizons for the use of polypropylene composites in conditions of high loads and high temperatures, which is important for the sustainable development of the electronics industry and other high-tech areas. Metal and polypropylene-based composites have the potential for application in high temperatures and aggressive environments due to the possibility of modifying their structure and composition. The methods and technologies presented in the article allow expanding their functional capabilities, including integration with innovative components.